Polishing-wheel



no Model.)

M. SWENSON.

POLISHING WHEEL.

Patented May 9; 1893.

x III a H Q and useful Improvements UNITED STATES PATENT OFFICE.

MALCOM SVVENSON, OF SUNAPEE, NEW HAMPSHIRE.

POLISHING-WHEEL.

SPECIFICATION forming part of Letters Patent No. 497,063, dated May 9,1893.

Application filed August 24:, 1891.

T at whom it may concern:

Be it known that I, MALCOM SWENSON, a citizen of the United States,residing at Sunapee, in the county of Sullivan and State of NewHampshire, have invented certain new in PolishinglVheels; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

The object of the present invention is to construct a polishing wheel insuch manner as to cause it to draw the ground material used forpolishing, from its exterior toward the center.

The invention consists in a wheel comprisin g a central and exteriorcircle connected by awebbing formed of radial and angularparts, whichwill be fully set forth in the following specification and claims andclearly illustrated in the drawings forming a part thereof, of which- IFigure 1. represents one of my improved wheels in cross-section, Fig. 2being a plan View of the wheel with the cap piece removed.

The wheel is provided with many openings A, of Various sizes and forms,some of which are rectangular and some triangular, so formed by reasonof the radial portions B, and the parts 0, which are placed atright-angles with four of said parts B, and ataforty-five-degree anglewith the other four of said parts B. In the exterior circular rim D,curved 0penings d, are made in a course eccentric with the center, andwhen the wheel is revolved in the direction of the arrow in Fig. 2, thepol- Serial No. 403,566. (No model.)

ishing material has only to be deposited upon the stone, and the wheelby aid of said openings d, will draw it in and distribute evenly. Theparts B all terminate at the centerin a circle D, and this also isprovided with openings d, to help the distribution of the polishingmaterial.

The accustomary disk or top plate E, is secured to the wheel by means ofpins F, which are secured in said wheel and pass upward through saidplate E, and are either bent over or headed as shown, and motion may betransmitted to said Wheel by a power driven shaft (not shown) connectedin some convenient manner to the said wheel at c.

Having described my invention, what I claim is- A polishing wheel havingits circumference divided into a plurality of arcs separated, each fromthe other, bya recess extending toward the center of the wheel andperpendicular to the circumference thereof, the toe of each arcprojecting but partially over its respective recess, andthe heel only,having an eccentric slope, a central circular recess having a pluralityof eccentric openings extending in a direction opposite to that ofrotation of the wheel, and means of communication between the saidrecesses and openings, and a retaining frame, as set forth.

In testimony whereof Iaffix my signature in presence of two witnesses.

MALCOM SWENSON. Witnesses:

J. B. THURSTON, CHAS. G. REMICK.

